Ellipsograph

Made:
1875-1885 in Baltimore

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Science Museum Group
© The Board of Trustees of the Science Museum

Ellipsograph patented 6 July 1875 in Washington, D.C. by Morton Toulmin and made by Watts & Co., Baltimore, Maryland, in walnut case with key

Details

Category:
Mathematics
Object Number:
1988-734
type:
ellipsographs
credit:
Tesseract